Shen's Vorpla Blade sound persists after enemy/minion death

Shen's Vorpla Blade sound persists after enemy/minion death

I've noticed that Shen's Vorpal Blade sound much like Akali's Mark of the Assassin used to persist after the death of minions. Early on it's not easy to notice because Shen can't two hit minions, but later he can and the sound persists in the area which the minion died. Not a big deal, but I thought I would point it out.